1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_RUNTIME_ARCH_ARM_CONTEXT_ARM_H_ 18 #define ART_RUNTIME_ARCH_ARM_CONTEXT_ARM_H_ 19 20 #include "arch/context.h" 21 #include "base/logging.h" 22 #include "registers_arm.h" 23 24 namespace art { 25 namespace arm { 26 27 class ArmContext : public Context { 28 public: 29 ArmContext() { 30 Reset(); 31 } 32 33 virtual ~ArmContext() {} 34 35 void Reset() OVERRIDE; 36 37 void FillCalleeSaves(const StackVisitor& fr) OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 38 39 void SetSP(uintptr_t new_sp) OVERRIDE { 40 bool success = SetGPR(SP, new_sp); 41 CHECK(success) << "Failed to set SP register"; 42 } 43 44 void SetPC(uintptr_t new_pc) OVERRIDE { 45 bool success = SetGPR(PC, new_pc); 46 CHECK(success) << "Failed to set PC register"; 47 } 48 49 uintptr_t* GetGPRAddress(uint32_t reg) OVERRIDE { 50 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters)); 51 return gprs_[reg]; 52 } 53 54 bool GetGPR(uint32_t reg, uintptr_t* val) OVERRIDE { 55 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters)); 56 if (gprs_[reg] == nullptr) { 57 return false; 58 } else { 59 DCHECK(val != nullptr); 60 *val = *gprs_[reg]; 61 return true; 62 } 63 } 64 65 bool SetGPR(uint32_t reg, uintptr_t value) OVERRIDE; 66 67 bool GetFPR(uint32_t reg, uintptr_t* val) OVERRIDE { 68 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfSRegisters)); 69 if (fprs_[reg] == nullptr) { 70 return false; 71 } else { 72 DCHECK(val != nullptr); 73 *val = *fprs_[reg]; 74 return true; 75 } 76 } 77 78 bool SetFPR(uint32_t reg, uintptr_t value) OVERRIDE; 79 80 void SmashCallerSaves() OVERRIDE; 81 void DoLongJump() OVERRIDE; 82 83 private: 84 // Pointers to register locations, initialized to NULL or the specific registers below. 85 uintptr_t* gprs_[kNumberOfCoreRegisters]; 86 uint32_t* fprs_[kNumberOfSRegisters]; 87 // Hold values for sp and pc if they are not located within a stack frame. 88 uintptr_t sp_, pc_; 89 }; 90 91 } // namespace arm 92 } // namespace art 93 94 #endif // ART_RUNTIME_ARCH_ARM_CONTEXT_ARM_H_ 95
